Bethlahem Institute of Engineering

Karungal, India

Bethlahem Institute of Engineering

Karungal, India
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Jasmine G.F.,Bethlahem Institute of Engineering | Roy S.D.D.,NMCC
Journal of Molecular Structure | Year: 2017

The molecular structure, vibrational spectra and polarizabilities of Ethyl 4-Dimethylaminobenzoate (EDAB) was investigated by density functional theory employing Becke's three parameter hybrid exchange functional with Lee–Yang–Parr (B3LYP) co-relational functional involving 6-311++G(d,p) basis set and compared with some other levels. A detailed interpretation of the IR and Raman spectra of EDBA have been reported and analyzed. Complete vibrational assignments of the vibrational modes have been done on the basis of the potential energy distribution (TED) using VEDA software. The molecular electrostatic potential mapped onto total density surface has been obtained. A study on the electronic properties, such as absorption wavelength, and frontier molecular orbitals energy, was performed using DFT approach. The stability of the molecule arising from hyper conjugative interactions and accompanying charge delocalization has been analyzed using natural bond orbital (NBO) analysis. The natural and Mulliken charge also calculated and compared with different level of calculation. The dipole moment, polarizability and first, second order hyperpolarizabilities of the title molecule were calculated and compared with the experimental values. The energy gap between frontier orbitals has been used along with electric moments and first order hyperpolarizability, to understand the non linear optical (NLO) activity of the molecule. The NLO activity of molecule was confirmed by SHG analysis. © 2017 Elsevier B.V.

Femila L.,Bethlahem Institute of Engineering | Vijayarangan V.,Easwari Engineering College
2014 International Conference on Communication and Network Technologies, ICCNT 2014 | Year: 2014

MANET is a set of mobile devices with no fixed topology. Ad hoc means 'for this purpose'. In MANET nodes are battery operated with dynamic network topology hence energy efficiency is an important design consideration to extend the lifetime of networks. Topology of network plays an important role for energy conservation. Topology control is to decide the transmission power of nodes and to increase network connectivity as well as increase the energy efficiency. In this paper, we present Cooperative Communication(CC) is to link disconnected networks in order to reduce transmission power of nodes with increased network connectivity.CC is a proficient technology to confess the quality of service (QoS) in MANETs. Thus, this paper proposes the energy efficient routing for MANET with the use of CC and network coding. Network coding used to reduce bandwidth consumption and hence power consumption also reduced. The proposed routing algorithm is efficient power aware routing with network coding (EPARN) identifies the capacity of a node not just by its residual battery power, but also by the expected energy spent in reliably forwarding data packets over a specific link. In simulation results, the performance of the proposed algorithms is compared with the other existing methods. © 2014 IEEE.

Kavitha M.R.,Bethlahem Institute of Engineering
Revista Tecnica de la Facultad de Ingenieria Universidad del Zulia | Year: 2016

This paper proposes a new channel model known as Gamma-Exponential channel model for Single Input Single Output(SISO) and Single Input Multiple Output(SIMO) free space optical communication system(FSO) using QAM modulation. As a part of analyzing turbulence in FSO, probability density function and bit error rate of FSO over turbulence channel is derived using Gamma-Exponential channel model. The derived BER is analyzed considering the effects of various turbulence conditions, link distance and refractive index structure parameter. SIMO-FSO system uses PFS multiuser scheduling algorithm to transmit signal from single user to selected user of multiple output. The performance of proposed channel model is compared using QAM and QPSK modulation with Mach-Zehnder Modulator (MZM). Simulation results show that BER of FSO improves if the system undergoes QPSK modulation with EAM and QAM modulation with MZM. © 2016, Revista Tecnica de la Facultad de Ingeniera. All rights reserved.

Blessy S.A.P.S.,Bethlahem Institute of Engineering
Technology and Health Care | Year: 2015

BACKGROUND: Segmentation of brain tumor from Magnetic Resonance Imaging (MRI) becomes very complicated due to the structural complexities of human brain and the presence of intensity inhomogeneities. OBJECTIVE: To propose a method that effectively segments brain tumor from MR images and to evaluate the performance of unsupervised optimal fuzzy clustering (UOFC) algorithm for segmentation of brain tumor from MR images. METHODS: Segmentation is done by preprocessing the MR image to standardize intensity inhomogeneities followed by feature extraction, feature fusion and clustering. RESULTS: Different validation measures are used to evaluate the performance of the proposed method using different clustering algorithms. The proposed method using UOFC algorithm produces high sensitivity (96%) and low specificity (4%) compared to other clustering methods. CONCLUSIONS: Validation results clearly show that the proposed method with UOFC algorithm effectively segments brain tumor from MR images. © 2015-IOS Press and the authors.

Joselin Herbert G.M.,Noorul Islam University | Iniyan S.,Anna University | Amutha D.,Bethlahem Institute of Engineering
Renewable and Sustainable Energy Reviews | Year: 2014

Energy is the prime mover of economic growth and is vital to sustain a modern economic and social development. Renewable energy applications have brought about significant changes in the Indian energy scenario. The identification and efficient use of various renewable energy resources are the thrust areas in energy development. Wind energy is one of the most environment friendly, clean and safe energy resources. The wind energy will continue to be the biggest renewable energy sector in any country in terms of both installed capacity and total potential. This paper reviews some important factors and techniques to be considered for wind turbine installations such as the wind energy resource assessment techniques, environmental factors, grid integration factors, control strategies, impact of offshore wind turbines and hybrid energy technologies, hydrogen production techniques, feed-in tariff mechanism, modeling of wind turbine components including generators, performance improvement techniques. The cost and economic feasibility of the wind energy conversion system as well as the control strategies of wind turbine generators have also been discussed. © 2014 Elsevier Ltd.

Prema C.E.,Bethlahem Institute of Engineering
Advanced Materials Research | Year: 2014

Metal matrix composites, produced by stir casting method, have more advantages when compared to other methods. Aluminium alloy Al6061 was reinforced with various percentages of TiB2 particles by using high energy stir casting method. The characterization was performed through EDS and SEM. The mechanical behaviours like hardness, tensile and wear were investigated. Wear experiments were conducted by using a pin-on-disc wear tester at varying load to evaluate the tribological property of Al6061- TiB2 composite. The wear mechanism was studied through SEM. In this study revealed that the addition of TiB2 improves the wear resistance of aluminium composites. The results showed that the mechanical properties, such as tensile strength, wear resistance and hardness increased by the percentage of TiB2 present in the samples when compared with base aluminium alloy. © (2014) Trans Tech Publications, Switzerland.

Blessy S.A.P.S.,Bethlahem Institute of Engineering
Applied Mechanics and Materials | Year: 2014

Accurate segmentation of brain tumor from MRI is crucial in computer aided diagnosis as well as in other medical imaging applications. Brain tumor segmentation is a challenging task due to the diverse appearance of tumor tissues. A variety of brain tumor segmentation techniques have been explored in the literature. Here, a brief review of different brain tumor segmentation techniques has been discussed with their merits and demerits. We conclude with a discussion on the trend of future research in brain tumor segmentation. © (2014) Trans Tech Publications, Switzerland.

Emmy Prema C.,Bethlahem Institute of Engineering | Vinsley S.S.,Lourdes College
Asian Journal of Information Technology | Year: 2016

In this study the performance of fire pixel segmentation technique is analysed in RGB, YUV, CIE L*a*b* and YCbCr color spaces using statistical parameters of the image. Various rules are formed in each color space by defining color and texture feature of the fire and also research is carried out to segment the fire centre region. The true fire pixels including fire flame region and fire centre region are effectively segmented from the background in YCbCr color space than the other color spaces. The fire pixel segmentation method using static features of fire (Color and texture) is less complex than dynamic features of fire like motion, flickering, rate of growing etc. and can be incorporated in the situation when the camera is moving. © Medwell Journals, 2016.

Premal C.E.,Bethlahem Institute of Engineering | Vinsley S.S.,LMC Engineering and Technology
2014 International Conference on Circuits, Power and Computing Technologies, ICCPCT 2014 | Year: 2014

In this paper image processing based forest fire detection using YCbCr colour model is proposed. The proposed method adopts rule based colour model due to its less complexity and effectiveness. YCbCr colour space effectively separates luminance from chrominance compared to other colour spaces like RGB and rgb(normalized RGB). The proposed method not only separates fire flame pixels but also separates high temperature fire centre pixels by taking in to account of statistical parameters of fire image in YCbCr colour space like mean and standard deviation. In this method four rules are formed to separate the true fire region. Two rules are used for segmenting the fire region and other two rules are used for segmenting the high temperature fire centre region. The results obtained are compared with the other methods in the literature and shows higher true fire detection rate and less false detection rate. The proposed method can be used for real time forest fire detection with moving camera. © 2014 IEEE.

Jasmine G.F.,Bethlahem Institute of Engineering | Amalanathan M.,Annai Velankanni College | Roy S.D.D.,NMCC
Journal of Molecular Structure | Year: 2016

The Charge transfer contributions to the second-order nonlinear optical properties of 2-Methyl-4-nitroaniline have been performed by means of DFT computation. The vibrational contribution studies of 2-Methyl-4-nitroaniline have also been performed using FTIR, FT-Raman analysis. More support on the experimental findings were added from the quantum chemical studies performed with DFT (B3LYP) method using 6-311++G(d,p)basis sets. Natural bond orbital analysis confirms the presence of intramolecular charge transfer and the hydrogen bonding interaction. The HOMO and LUMO analysis reveals the possibility of charge transfer within the molecule. The first order hyperpolarizability (α0) and related properties (β,α0 and Δα) of 2-Methyl-4-nitroaniline were calculated. In addition, molecular electrostatic potential (MEP), charge analysis also were investigated using theoretical calculations. © 2016 Elsevier B.V. All rights reserved.

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